嵌入斯瓦尔巴特群岛巴伦支岛海洋极限海滩沉积物中的弓头鲸脊椎骨

IF 1.9 4区 地球科学 Q3 ECOLOGY Polar Research Pub Date : 2024-04-19 DOI:10.33265/polar.v43.9724
Per Möller
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引用次数: 0

摘要

位于斯瓦尔巴群岛巴伦支岛东南部伊拉达伦(Iladalen)的一个跨谷海滩阶地被解释为由长岸沉积物迁移和沉积形成,其最大高度约为海拔 88 米,标志着降冰期的海洋界限。在海拔 80 米左右的沿岸沉积物上部发现了一块鲸椎骨--很可能来自弓头鲸(Balaena mysticetus)--该椎骨的年代为公元前 10 762 ± 137 卡年,距巴伦支海沿海地区公认的消融期(约 11 000 年前)仅数百年。这块脊椎骨的年龄和海拔位置非常符合为伊拉达伦东南偏东约 29 公里处的边缘岛东北端绘制的相对海平面曲线。
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A bowhead whale vertebra embedded in marine limit beach sediment on Barentsøya, Svalbard

A cross-valley beach terrace in Iladalen, in the south-east of the island of Barentsøya, Svalbard, is interpreted as having been built by long-shore sediment transport and deposition, with its maximum height at about 88 m a.s.l., marking the marine limit at deglaciation. A whale vertebra—most probably from a bowhead whale (Balaena mysticetus)—was found embedded in the upper part of the littoral sediments at a height of ca. 80 m a.s.l., that is, about 8 m below the marine limit at deglaciation The bone is dated to 10 762 ± 137 cal yr BP, just a few hundred years after the generally accepted deglaciation of the coastal parts of Barentsøya, about 11 000 years ago. The vertebra’s age and altitudinal position fit well with the relative sea-level curve constructed for the north-eastern tip of the island of Edgeøya, some 29 km east–south-east of Iladalen.

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来源期刊
Polar Research
Polar Research 地学-地球科学综合
CiteScore
3.20
自引率
5.30%
发文量
22
审稿时长
>12 weeks
期刊介绍: Since 1982, Polar Research has been the international, peer-reviewed journal of the Norwegian Polar Institute, Norway''s central institution for research, environmental monitoring and mapping of the polar regions. Aiming to promote the exchange of scientific knowledge about the Arctic and Antarctic across disciplinary boundaries, Polar Research serves an international community of researchers and managers. As an open-access journal, Polar Research makes its contents freely available to the general public. Original primary research papers comprise the mainstay of Polar Research. Review articles, brief research notes, letters to the editor and book reviews are also included. Special issues are published from time to time. The scope of Polar Research encompasses research in all scientific disciplines relevant to the polar regions. These include, but are not limited to, the subfields of biology, ecology, geology, oceanography, glaciology and atmospheric science. Submissions from the social sciences and those focusing on polar management and policy issues are welcome. Contributions about Antarctica are particularly encouraged.
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